Abstract
The Highway Cost Allocation Study (HCAS) is critical in the State of Oregon’s efforts to ensure that highway maintenance, operation, and improvement costs are fairly distributed among various road users. The Oregon HCAS is conducted biennially using projected data for revenue and expenditures. The Oregon’s Office of Economic Analysis (OEA) tasked a team of researchers from Oregon State University (OSU) to accomplish the following objectives: 1. Objective 1. Verify that the HCAS models for the 2017-2019, 2019-2021, and 2021- 2023 biennia can be executed and produce the same output using projected data. 2. Objective 2. Examine the differences in the scaled equity ratios and cost responsibility shares across vehicle classes when using actual revenue and cost data versus projected data. To fulfill these objectives, the Oregon Department of Transportation (ODOT) provided the OSU research team with revenue and cost data sets (i.e., projected and actual) for all biennia.